San Diego County, San Diego Rat Control Situation:
Hi David, Is a UV blacklight still useful, exterior-wise, if it rains after the rodents leave their urine stains? I am in the process of performing exterior maintenance to better exclude my roof rats. 1) I have a 25 year old cedar shake roof in San Diego California with openings under each shake along the rake edge of the roof at the gable ends of my house. There's no drip edge, i.e. under the shakes I have roofing paper (now somewhat curled) that runs more or less up to and rests right atop the fascia board. Because I have skip sheathing, and since the cross section of a shake is a wedge that is up to one inch at the upper, thick end, this appears to create many huge entry points along the rake edges even though the sheathing is rabbeted into the fascia board. As a result, I'm thinking of getting a UV blacklight to use outside the house to sleuth for urine stains along the upper edge of the gable end shakes and fascia boards. My question is, how easily does the winter rain wash away the urine, rendering this a pointless exercise? 2) I noticed a new product called "rat-out gel" and was thinking of applying it along the rake edges mentioned above. Or, maybe I should just buy many rolls of X-Clude and use that instead. Or maybe both. Any comment? Thanks very much for your website, Doug
My response: First off, I do not have experience using UV lights to detect rat urine. But I do suspect that rain will severely limit the effectiveness of this approach. I have never heard of Rat-Out Gel or XClude, but I typically stick to physical barriers rather than repellent type devices. If your roof makes this impossible, you might have a tough time keeping the rats out.
San Diego Rat Control Tip of The Week
Rat Damage In The Attic
Having rats in your attic is substantially more than only an irritation. These rodents can cause a lot of harm, mainly because they are generally social animals that live in groups. There is a chance of the rats in your attic putting your family in danger of getting a disease, and these animals will likewise cause physical damage to your attic.
Leaving Feces
The essential harm that rats will cause in an attic is leaving their waste products behind, especially excrement. Depending on the number of rats in the attic and how long they were there, there can be a significant measure of these waste products, requiring serious clean-up. In some cases, the urine may even drench into planks of flooring or other wood structures and compromise their integrity. At the very least, the urine and excrement will debase your attic, spreading illness and causing a foul smell. If you don't deal with this smell, it might attract more wildlife to the attic.
Chewing Wires, Pipes, Insulation, And More
Like mice, rats will bite on almost anything you have in your attic, regardless of whether it is a wire, funnel, or something else. Rats are famous for their gnawing behavior and will bite on anything in your attic. In the case of chewed wires, this can result in a serious fire hazard, especially if you don't know that the wire has been compromised. Rats may likewise damage your pipes and insulation from chewing. Without the insulation fit as a fiddle, your home won't manage temperature as effectively, making you spend more cash to run your cooling in the summer and heating in the winter. If you have anything stored in your attic, for example, books or old furnishings, you can expect these also to be damaged by rats. They will likely be chewed and may even end up covered in waste products.
